| 主权项 |
1. A light-emitting device, comprising:
a base substrate having a base surface; a light-emitting element (LEE) configured to emit light, the LEE being disposed on the base surface; a first optical element having a first surface spaced apart from the LEE and positioned to receive light from the LEE, the first optical element comprising scattering centers arranged to scatter light from the LEE, wherein the first optical element has a non-hemispherical shape; a second optical element having an exit surface, the second optical element being transparent and in contact with the first optical element, there being an optical interface between the first and second optical elements at the place of contact, the optical interface being opposite the first surface of the first optical element, the second optical element being arranged to receive at least a portion of the light through the optical interface; and a transparent shell having an inner surface and an opposing outer surface, the inner surface being in contact with the exit surface of the second optical element, wherein:
a medium adjacent to the first surface of the first optical element having a refractive index n0,the first optical element comprises a material having a refractive index n1, where n0<n1,the second optical element comprises a material having a refractive index n2, where n0<n2, andthe transparent shell comprises a material having a refractive index n3, where n3≧n2.
|
